IP Library › Granted Patent US 9,601,059
Granted Patent B2
US 9,601,059 · App. 13/472,418 · Granted Mar 21, 2017

Dynamic backlight control selector

Inventors: Ken Foo (Sunnyvale, CA); Kevin Tom (San Francisco, CA)
Assignee: Google Inc.
G09G3/3406G09G2320/0646G09G2320/103G09G2330/021G09G2360/16
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Quick Facts
Patent No.
US 9,601,059
App. No.
13/472,418
Granted
Mar 21, 2017
Kind
B2
Abstract

A computer-implemented method for automatically controlling a dynamic backlight control (DBC) of a display is disclosed according to one aspect of the subject technology. The method comprises determining whether an image to be displayed on the display comprises a high-resolution still image, and, if the image comprises a high-resolution still image, then disabling the DBC.

Claims (28)

1. A computer-implemented method for automatically controlling a dynamic backlight control (DBC) of a display, the method comprising:

determining whether an image to be displayed on the display comprises a still image and not a video image, based on a file extension or a file header for an image file of the image;

determining, in response to determining that the image is a still image, whether the still image comprises a high-resolution still image;

in response to determining that the still image comprises a high-resolution still image, disabling the DBC, wherein a backlight of the display is turned on and kept at approximately a constant brightness when the DBC is disabled; and

in response to determining that the image is not a still image or that the still image does not comprise a high-resolution still image, enabling the DBC, wherein the backlight of the display is turned on while the DBC dynamically adjusts a turned-on brightness of the backlight of the display based on content of the image when the DBC is enabled.

2. The method of claim 1 , wherein determining whether the still image comprises a high-resolution still image comprises determining that the still image is a high-resolution still image when the image has a resolution exceeding a resolution threshold.

3. The method of claim 1 , wherein determining whether the still image comprises a high-resolution still image comprises determining that the still image is a high-resolution image when an image file corresponding to the image has a file size exceeding a certain file size.

4. The method of claim 1 , wherein determining whether the image comprises a still image and not a video image based on the file extension or the file header for the image file of the image comprises determining that the image is a still image and not a video image when the file extension or the file header specifies one of a joint photographic experts group (jpeg) file, a tagged image format file (tiff), and a bitmap (bmp) file.

5. The method of claim 1 , wherein the display comprises a liquid crystal display (LCD).

6. A computer-readable storage medium comprising instructions stored therein, which when executed by a machine, cause the machine to perform operations for automatically controlling a dynamic backlight control (DBC) of a liquid crystal display (LCD), the operations comprising:

determining whether an image to be displayed on the LCD comprises a still image and not a video image when the image is from an image file having a file extension or a file header indicative of a still image;

determining, in response to determining that the image is a still image, whether the still image comprises a high-resolution still image;

in response to determining that the still image comprises a high-resolution still image, disabling the DBC, wherein a backlight of the LCD is turned on and kept at approximately a constant brightness when the DBC is disabled; and

in response to determining that the image is not a still image or that the still image does not comprise a high-resolution still image, enabling the DBC, wherein the backlight of the LCD is turned on while the DBC dynamically adjusts a turned-on brightness of the backlight of the LCD based on content of the image when the DBC is enabled.

7. The computer-readable storage medium of claim 6 , wherein determining whether the still image comprises a high-resolution still image comprises determining that the still image is a high-resolution still image when the image has a resolution exceeding a resolution threshold.

8. The computer-readable storage medium of claim 6 , wherein determining whether the still image comprises a high-resolution still image comprises determining that the still image is a high-resolution image when an image file corresponding to the image has a file size exceeding a certain file size.

9. The computer-readable storage medium of claim 6 , wherein determining whether the image comprises a still image and not a video image when the image is from the image file having the file extension or the file header indicative of the still image comprises determining that the image is a still image when the file extension or the file header specifies one of a joint photographic experts group (jpeg) file, a tagged image format file (tiff), and a bitmap (bmp) file.

10. A system for automatically controlling a dynamic backlight control (DBC) of a display, the system comprising:

one or more processors; and

a machine-readable medium comprising instructions stored therein, which when executed by the one or more processors, cause the one or more processors to perform operations comprising:

determining whether an image to be displayed on the display comprises a still image and not a video image, based on a file extension or a file header of an image file for the image;

determining, in response to determining that the image is a still image, whether the still image comprises a high-resolution still image;

in response to determining that the still image comprises a high-resolution still image, disabling the DBC, wherein a backlight of the display is turned on and kept at approximately a constant brightness when the DBC is disabled; and

in response to determining that the image is not a still image or that the still image does not comprise a high-resolution still image, enabling the DBC, wherein the backlight of the display is turned on while the DBC dynamically adjusts a turned-on brightness of the backlight of the display when the DBC is enabled.

11. The system of claim 10 , wherein determining whether the still image comprises a high-resolution still image comprises determining that the still image is a high-resolution still image when the image has a resolution exceeding a resolution threshold.

12. The system of claim 10 , wherein determining whether the still image comprises a high-resolution still image comprises determining that the still image is a high-resolution still image when the image file corresponding to the image has a file size exceeding a certain file size.

13. The system of claim 10 , wherein determining whether the still image comprises a high-resolution still image comprises determining that the still image is a high-resolution image when a number of pixels in the image exceeds a certain number of pixels.

14. The system of claim 10 , wherein the DBC dynamically adjusts the backlight of the display based on content of the image.

Assignments (2)
CHANGE OF NAME Recorded Oct 2, 2017
From: GOOGLE INC.
To: GOOGLE LLC
Reel/Frame 044097/0658 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 18, 2012
From: FOO, KEN; TOM, KEVIN
To: GOOGLE INC.
Reel/Frame 028233/0234 →
Continuity (1)
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